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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 103 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.69 + 79 =
  2. 2.73 + 33 =
  3. 3.29 + 27 =
  4. 4.76 + 15 =
  5. 5.56 + 66 =
  6. 6.88 + 32 =
  7. 7.63 + 22 =
  8. 8.25 + 64 =
  9. 9.61 + 64 =
  10. 10.32 + 76 =
  11. 11.28 + 39 =
  12. 12.40 + 33 =
  13. 13.44 + 24 =
  14. 14.29 + 55 =
  15. 15.64 + 63 =
  16. 16.46 + 13 =
  17. 17.51 + 17 =
  18. 18.41 + 21 =
  19. 19.79 + 12 =
  20. 20.21 + 72 =
  21. 21.54 + 51 =
  22. 22.23 + 56 =
  23. 23.74 + 29 =
  24. 24.52 + 13 =
  25. 25.63 + 23 =
  26. 26.34 + 21 =
  27. 27.37 + 56 =
  28. 28.67 + 12 =
  29. 29.49 + 51 =
  30. 30.55 + 61 =
  31. 31.83 + 37 =
  32. 32.31 + 33 =
  33. 33.56 + 25 =
  34. 34.66 + 39 =
  35. 35.88 + 21 =
  36. 36.64 + 17 =
  37. 37.47 + 79 =
  38. 38.69 + 18 =
  39. 39.88 + 28 =
  40. 40.88 + 56 =

Answer key

  1. 148
  2. 106
  3. 56
  4. 91
  5. 122
  6. 120
  7. 85
  8. 89
  9. 125
  10. 108
  11. 67
  12. 73
  13. 68
  14. 84
  15. 127
  16. 59
  17. 68
  18. 62
  19. 91
  20. 93
  21. 105
  22. 79
  23. 103
  24. 65
  25. 86
  26. 55
  27. 93
  28. 79
  29. 100
  30. 116
  31. 120
  32. 64
  33. 81
  34. 105
  35. 109
  36. 81
  37. 126
  38. 87
  39. 116
  40. 144

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